/*
 * Copyright 2018 Meituan Dianping. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.meituan.dorado.degrade;

import com.meituan.dorado.common.Constants;
import com.meituan.dorado.rpc.handler.invoker.Invoker;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class NodeDegrade {
    private static final Logger logger = LoggerFactory.getLogger(NodeDegrade.class);

    public static void weightDegradeToZero(Invoker invoker, String reason) {
        double oriWeight = invoker.getProvider().getWeight();
        invoker.getProvider().degrade(0);
        String remoteIpPort = invoker.getProvider().getIp() + Constants.COLON + invoker.getProvider().getPort();
        logger.warn("Degrade {} set weight:{}->0 temporarily, {}", remoteIpPort, oriWeight, reason);
    }

    public static void weightRecover(Invoker invoker) {
        double weight = invoker.getProvider().degradeRecover();
        String remoteIpPort = invoker.getProvider().getIp() + Constants.COLON + invoker.getProvider().getPort();
        logger.info("The weight of {} recover to {}", remoteIpPort, weight);
    }
}
